the average chloroplast number in stoma guard cell increase with the increase of ploidy, the average chloroplast number in diploid and tetraploid varieties are 13.69 and 23.24. 4.

• 饲用甜菜叶片气孔保卫细胞叶绿体数目随着倍性的增加而增加；二倍体叶片气孔保卫细胞叶绿体平均数为13.；69；而四倍体叶片气孔保卫细胞叶绿体数达23